Asymmetric Conjugate Addition of Grignard Reagents to Pyranones
作者:Bin Mao、Martín Fañanás-Mastral、Ben L. Feringa
DOI:10.1021/ol303141x
日期:2013.1.18
efficient enantioselectivesynthesis of lactones was developed based on the catalyticasymmetricconjugateaddition (ACA) of alkyl Grignard reagents to pyranones. The use of 2H-pyran-2-one for the first time in the ACA with Grignard reagents allows for a variety of further transformations to access highly versatile building blocks such as β-alkyl substituted aldehydes or β-bromo-γ-alkyl substituted alcohols
基于烷基格氏试剂向吡喃酮的催化不对称共轭加成(ACA),开发了内酯的有效对映选择性合成。带有Grignard试剂的ACA中首次使用2 H -pyran-2-one可以进行多种进一步的转化,以得到高度通用的结构单元,例如β-烷基取代的醛或β-溴-γ-烷基取代的具有出色的区域选择性和立体选择性的醇。